.container {
    position: relative;
  
    .btns {
      position: absolute;
      top: 0;
      left: 0;
      width: 100vh;
      transform-origin: 0 0;
      // 注意这里，手动把按钮组横了过来
      transform: rotateZ(90deg) translateY(-100%);
      display: flex;
      justify-content: center;
      padding: 32px 0px;
  
      .btn {
        margin: 0px 16px;
        width: 20vh;
      }
    }
  }
  